virtualkeyboard: add a hook for ScreenChanged()

Change-Id: I18d2a4e7e29858406c75dae54c6ea6c5f5e0c26b
Reviewed-on: https://review.haiku-os.org/c/haiku/+/8903
Reviewed-by: waddlesplash <[email protected]>

src/add-ons/input_server/devices/virtualkeyboard/VirtualKeyboardWindow.cpp

@@ -38,9 +38,7 @@ VirtualKeyboardWindow::VirtualKeyboardWindow(BInputServerDevice* dev)
 {
 	BScreen screen;
 	BRect screenRect(screen.Frame());
-
+	ScreenChanged(screenRect, screen.ColorSpace());
-	ResizeTo(screenRect.Width(), screenRect.Height() / 3);
-	MoveTo(0, screenRect.Height() - screenRect.Height() / 3);
 
 	SetLayout(new BGroupLayout(B_VERTICAL));
 
@@ -159,3 +157,11 @@ VirtualKeyboardWindow::MessageReceived(BMessage* message)
 {
 	BWindow::MessageReceived(message);
 }
+
+
+void
+VirtualKeyboardWindow::ScreenChanged(BRect screenRect, color_space depth)
+{
+	ResizeTo(screenRect.Width(), screenRect.Height() / 3);
+	MoveTo(0, screenRect.Height() - screenRect.Height() / 3);
+}

src/add-ons/input_server/devices/virtualkeyboard/VirtualKeyboardWindow.h

@@ -20,6 +20,7 @@ class VirtualKeyboardWindow : public BWindow {
 public:
 							VirtualKeyboardWindow(BInputServerDevice* dev);
 		virtual void		MessageReceived(BMessage* message);
+		virtual void		ScreenChanged(BRect screenRect, color_space depth);
 
 private:
 		KeyboardLayoutView* fKeyboardView;